man pages installation on OpenBSD with USE_BSD_MAKEFILE

Hi,
Currently no man pages will be installed on OpenBSD with USE_BSD_MAKEFILE.
Anyone know why
pkgsrc/pkgtools/bootstrap-mk-files/files/mods/OpenBSD.bsd.man.mk is
so differ than others?
--
"Of course I love NetBSD":-)
OBATA Akio / obache%NetBSD.org@localhost